Sanding machine



A. G. ERICKSON ETAL SANDING MACHINE Flled April 4, 1928 April 12, 1932.

2 Sheets-Sheet 1 w m m April 12, 1932- A. a. ERICKSON ETAL 1,353,516

SANDING MACHINE Filed April 4, 1928 2 Sheets-Sheet 2 IN VEN TOR fq//n 6 fi/ckson Patented Apr. 12, 1932 UNITED. STATES PATENT OFFICE ALBIN G. ERICKSON AND HENNING JOHNSON, 013' DETROIT, MICHIGAN, ASSIGNORS TO GENERAL MOTORS CORPORATION, OF DETROIT, MICHIGAN, A CORPORATION OF DELAWARE SANDING MACHINE Application filed April 4,

The present invention has to do with sanding machines.

Sanding machines for abrading all kinds of wooden objects are very old and very numerous.

The present invention is an improvement over the sanding machine shown in the Wysong Patent #994,358, it being the object of the invention to provide a machine in which the work may be rapidly and conveniently laid on the work rest and the belt moved over onto the Work.

In the drawings Fig. 1 is a side elevation of the machine.

Fig. 2 is a plan view.

Fig. 3 is a sectional perspective in detail.

Fig. 4 is a section on the line 44 of F ig. 2.

Fig. 5 is a similar section showing the sanding belt moved over onto the work.

Fig. 6 is a section taken on the line 66 of Fig. 1.

The machine is intended primarily for sanding and finishing garnish moldings used on automobile bodies. These garnish moldings are now almost universally finished by hand and it requires considerable time and labor cost to finish these moldings. The present invention is capable of finishing moldings much more rapidly and cheaply. Referring to the drawings, 1 and 2 represents standards or frames arranged to carry a belt pulley wheel 1a and 1?) over which runs a belt 3. This belt, as will be seen in Fig. 2, normally does not run over the work on the table. The work table is designated 4 and a piece of garnish molding 5. This is set into a recess 6 of the table against a sharp pin 8 which holds it in place and prevents it from flying out. The pulley wheel 1a has its shaftslightly canted from a position perpendicular with the line of travel of the belt. This is to permit the belt to be pulled over slightly without pulling it 011 the pulleys.

9 designates a shoe of hard wood having a handle 10 and provided with a hook portion 11 to hook over the inside of the belt so that the shoe can be caused to pull the belt over onto the work. This will be readily understood by comparing Figs. 4 and 5.

The pulley wheel 1a is carried on a. clove 1928. Serial No. 267,174.

tail slide 12 adjustable with a screw 13 to alter the tension of the belt.

Most sanding belts are made of paper, but in order to provide a strong and durable belt which can stand the strains incident in pulling it out of its path, it is preferred to use a cloth belt provided with a suitable sand or other abrading surface.

By reason of our arrangement, the belt i always out of the way while the work is being taken out and replaced. Consequently the workman may work very rapidly, and added to this he has the security of not having the belt passed directly over the work seat, as in such patents as Wysong and others of the prior art.

We find further that this pulling of the belt out of place is very effective in giving tension to the belt to abrade the curve of the garnish molding, as at point 14.

It will be noted that the slides have a very large clearance with respect to the dovetail grooves. Set screws 15 are adapted to hold the slide in this groove. It will be obvious that by adjusting these that the cant of the pulley wheel shaft can be controlled.

What we claim is:

In a machine for sanding garnish moldings and other articles, the combination of a traveling sanding belt, means comprising pulleys on non-parallel axes for supporting the belt so as to permit the beltto be; defiected edgewise somewhat out of its pathof travel between the supporting means, a work seat supported on one side, edgewise, of the said path of travel, and a shoe provided with a hook portion to grasp the inside edge of the belt and by which it may be pulled over the work seat when applied to the work.

In testimony whereof we aflix our signatures.

ALBIN G. ERICKSON. HENNING JOHNSON. 

